BPI's October Stump the Chump! - Home Energy Pros2015-03-31T22:49:05Zhttp://homeenergypros.lbl.gov/forum/topics/bpi-s-october-stump-the-chump?groupUrl=bpi&commentId=6069565%3AComment%3A97549&groupId=6069565%3AGroup%3A2214&feed=yes&xn_auth=noSLICK!!!tag:homeenergypros.lbl.gov,2012-11-01:6069565:Comment:975542012-11-01T17:17:39.382Ztedkiddhttp://homeenergypros.lbl.gov/profile/tedkidd
<p>SLICK!!!</p>
<p>SLICK!!!</p> When you say, "The new energy…tag:homeenergypros.lbl.gov,2012-11-01:6069565:Comment:975492012-11-01T16:39:11.918ZJames Whitehttp://homeenergypros.lbl.gov/profile/JamesWhite
<p>When you say, "The new energy bills are the same as the past 20 years", my first response would be to show me the data so I can run a billing anlysis. I put together a <a href="http://homeenergypros.lbl.gov/group/buildingsimulations/forum/attachment/download?id=6069565%3AUploadedFile%3A97386" target="_blank">spreadsheet</a> that analyzes gas and electric billing histories. The analysis simply calculates the average energy usage for each bill and plots it with that month's average monthly…</p>
<p>When you say, "The new energy bills are the same as the past 20 years", my first response would be to show me the data so I can run a billing anlysis. I put together a <a href="http://homeenergypros.lbl.gov/group/buildingsimulations/forum/attachment/download?id=6069565%3AUploadedFile%3A97386" target="_blank">spreadsheet</a> that analyzes gas and electric billing histories. The analysis simply calculates the average energy usage for each bill and plots it with that month's average monthly temperature. This normalizes the data for different number of read days in each month and adjusts for weather variations.</p> looking at the information pr…tag:homeenergypros.lbl.gov,2012-10-26:6069565:Comment:971722012-10-26T14:34:43.406ZDavid Berghttp://homeenergypros.lbl.gov/profile/DavidBerg
<p>looking at the information provided:</p>
<p><br/>1 - is the system a multistage unit to better match load as well as zoning demands.</p>
<p>2 - is the heating capacity properly matched to to home demand - does the backup heat run?</p>
<p>3 - is the cooling capacity too large - so homeowner sets thermostat lower to dehumidify</p>
<p>looking at the information provided:</p>
<p><br/>1 - is the system a multistage unit to better match load as well as zoning demands.</p>
<p>2 - is the heating capacity properly matched to to home demand - does the backup heat run?</p>
<p>3 - is the cooling capacity too large - so homeowner sets thermostat lower to dehumidify</p> Be really helpful to see th…tag:homeenergypros.lbl.gov,2012-10-19:6069565:Comment:966842012-10-19T17:55:00.708Ztedkiddhttp://homeenergypros.lbl.gov/profile/tedkidd
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<p>Be really helpful to see the load calc and have a blower door #. </p>
<blockquote><p>The new system performs well (70 in the summer and 68 in the winter)</p>
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<p>A 70 setting for comfort in summer indicates gross oversizing. (poor latent removal means lower sensible is required to achieve comfort.) From there you can suspect cycling losses/short cycling is partially to blame for lack of efficiency. </p>
<p>They didn't expect to save…</p>
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<p>Be really helpful to see the load calc and have a blower door #. </p>
<blockquote><p>The new system performs well (70 in the summer and 68 in the winter)</p>
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<p>A 70 setting for comfort in summer indicates gross oversizing. (poor latent removal means lower sensible is required to achieve comfort.) From there you can suspect cycling losses/short cycling is partially to blame for lack of efficiency. </p>
<p>They didn't expect to save on heating when they have natural gas, did they? Exaggerated expectations by the sales person, and acceptance without research by the homeowner, can also be partially to blame. </p>
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<p>Are they tracking entering and leaving water temperatures? Run times? How about External Static Pressure? These things will better tell how much of a design failure we have than "it maintains the temperature we set it at". </p>
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